TY - JOUR
T1 - The temporal variations in principal and shallow-water tidal constituents and their application in tidal level calculation
T2 - an example in Zhoushan Archipelagoes with complex bathymetry
AU - Wei, Zilu
AU - Jiao, Xiaohui
AU - Du, Yunfei
AU - Zhang, Jicai
AU - Pan, Haidong
AU - Wang, Guansuo
AU - Wang, Daosheng
AU - Wang, Ya Ping
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/4/15
Y1 - 2023/4/15
N2 - Temporal variations in tides are critical for ocean dynamics and engineering activities around coastal areas. Based on the data observed from 8 tide-gauge stations spanning 2 years (2016–2017), variations in principal (M2, S2, K1, O1) and shallow-water (M4, MS4, M6, 2MS6) tidal constituents in the Zhoushan Archipelagoes were studied by applying both classic and moving harmonic analysis methods. The temporal variations in the S2 and K1 harmonic parameters show annual cycles, while those of M2 and O1 are dominated by semi-annual cycles at most stations. The variations in shallow-water tides are more complex: larger discrepancies were observed among all stations and the variations in the harmonic parameters of the same constituent also varied differently. The phase lag variations were attributed mainly to changes in wind and runoff. Regarding the amplitude variations, the mean sea level and stratification played a considerable role; in addition, the effect of runoff on the semi-annual variation of amplitudes was significant. The predicted tidal levels and engineering water levels are improved when the temporal variations in harmonic parameters were considered, thereby benefiting practical application and related issues in coastal engineering and management.
AB - Temporal variations in tides are critical for ocean dynamics and engineering activities around coastal areas. Based on the data observed from 8 tide-gauge stations spanning 2 years (2016–2017), variations in principal (M2, S2, K1, O1) and shallow-water (M4, MS4, M6, 2MS6) tidal constituents in the Zhoushan Archipelagoes were studied by applying both classic and moving harmonic analysis methods. The temporal variations in the S2 and K1 harmonic parameters show annual cycles, while those of M2 and O1 are dominated by semi-annual cycles at most stations. The variations in shallow-water tides are more complex: larger discrepancies were observed among all stations and the variations in the harmonic parameters of the same constituent also varied differently. The phase lag variations were attributed mainly to changes in wind and runoff. Regarding the amplitude variations, the mean sea level and stratification played a considerable role; in addition, the effect of runoff on the semi-annual variation of amplitudes was significant. The predicted tidal levels and engineering water levels are improved when the temporal variations in harmonic parameters were considered, thereby benefiting practical application and related issues in coastal engineering and management.
KW - Harmonic analysis
KW - Practical application
KW - Temporal variations
KW - Tides
KW - Zhoushan Archipelagoes
UR - https://www.scopus.com/pages/publications/85149060736
U2 - 10.1016/j.ocecoaman.2023.106516
DO - 10.1016/j.ocecoaman.2023.106516
M3 - 文章
AN - SCOPUS:85149060736
SN - 0964-5691
VL - 237
JO - Ocean and Coastal Management
JF - Ocean and Coastal Management
M1 - 106516
ER -